BUG: panic when using fs:posix as dict for acl_shared_dict

[Aragon Gouveia]

Yes, I have worked around it with sqlite in the mean time.  Thank you!



On 2019/12/13 16:47, aki.tuomi at dovecot.fi wrote:
> It's not very high priority I'm afraid. Did you try using sqlite instead?
> 
> Aki
> 
>> On 13/12/2019 17:40 Aragon Gouveia <aragon at phat.za.net> wrote:
>>
>>   
>> Hi Aki,
>>
>> I'm not sure if this bug was worked on?  Sadly I ran into it too
>> recently, on version 2.3.4.1.
>>
>>
>> Regards,
>>
>> Aragon
>>
>>
>>
>> On 2018/02/07 13:23, Aki Tuomi wrote:
>>> Hi!
>>>
>>> Thank you for reporting this issue. We'll look into it. Maybe you can
>>> use sqlite3 instead as workaround?
>>>
>>> Aki
>>>
>>>
>>> On 07.02.2018 14:22, Marco Giunta wrote:
>>>> Hi,
>>>> I'm using Dovecot 2.2.33.2 on a RHEL 7, new installation. When I use
>>>> fs:posix as dict for acl_shared_dict, like in Dovecot wiki
>>>> (https://wiki.dovecot.org/SharedMailboxes/ClusterSetup),
>>>> doveadm-server crash with error:
>>>>
>>>> # doveadm acl set -u USERNAME FOLDER user=DEST_USERNAME lookup read
>>>> write-seen
>>>>
>>>> doveadm(USERNAME): Panic: file dict-fs.c: line 127
>>>> (fs_dict_iterate_init): assertion failed: ((flags &
>>>> DICT_ITERATE_FLAG_RECURSE) == 0)
>>>> doveadm(USERNAME): Error: Raw backtrace:
>>>> /usr/lib64/dovecot/libdovecot.so.0(+0x9f3de) [0x7f0e4a4b23de] ->
>>>> /usr/lib64/dovecot/libdovecot.so.0(default_fatal_handler+0x2a)
>>>> [0x7f0e4a4b244a] -> /usr/lib64/dovecot/libdovecot.so.0(i_fatal+0)
>>>> [0x7f0e4a44377c] -> /usr/lib64/dovecot/libdovecot.so.0(+0x31688)
>>>> [0x7f0e4a444688] ->
>>>> /usr/lib64/dovecot/libdovecot.so.0(dict_iterate_init_multiple+0x4d)
>>>> [0x7f0e4a47cadd] ->
>>>> /usr/lib64/dovecot/libdovecot.so.0(dict_iterate_init+0x29)
>>>> [0x7f0e4a47cb89] ->
>>>> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_lookup_dict_rebuild+0x3e1)
>>>> [0x7f0e49a40371] ->
>>>> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_backend_vfile_acllist_rebuild+0x488)
>>>> [0x7f0e49a3dd18] ->
>>>> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_backend_vfile_object_update+0x3c7)
>>>> [0x7f0e49a3e867] ->
>>>> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_mailbox_update_acl+0x68)
>>>> [0x7f0e49a41e28] ->
>>>> /usr/lib64/dovecot/doveadm/lib10_doveadm_acl_plugin.so(+0x2c11)
>>>> [0x7f0e48da1c11] ->
>>>> /usr/lib64/dovecot/doveadm/lib10_doveadm_acl_plugin.so(+0x3060)
>>>> [0x7f0e48da2060] -> doveadm(+0x2b41c) [0x556f1280b41c] ->
>>>> doveadm(+0x2c01a) [0x556f1280c01a] ->
>>>> doveadm(doveadm_cmd_ver2_to_mail_cmd_wrapper+0x23b) [0x556f1280ce7b]
>>>> -> doveadm(doveadm_cmd_run_ver2+0x50c) [0x556f1281c73c] ->
>>>> doveadm(doveadm_cmd_try_run_ver2+0x37) [0x556f1281c7d7] ->
>>>> doveadm(main+0x1e4) [0x556f127fb944] ->
>>>> /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f0e4a071c05] ->
>>>> doveadm(+0x1bd35) [0x556f127fbd35]
>>>> Aborted
>>>>
>>>> Attached coredump and configuration.
>>>>
>>>> I'm not a programmer, but seems that assert is raised by
>>>> 'fs_dict_iterate_init' function inside 'src/lib-dict-extra/dict-fs.c':
>>>>
>>>> static struct dict_iterate_context *
>>>> fs_dict_iterate_init(struct dict *_dict, const char *const *paths,
>>>>                enum dict_iterate_flags flags)
>>>> {
>>>> ...
>>>>           /* these flags are not supported for now */
>>>>       i_assert((flags & DICT_ITERATE_FLAG_RECURSE) == 0);
>>>> ...
>>>>
>>>>
>>>> because it is called by 'acl_lookup_dict_iterate_read' function in
>>>> file 'src/plugins/acl/acl-lookup-dict.c'
>>>>
>>>> static void acl_lookup_dict_iterate_read(struct acl_lookup_dict_iter
>>>> *iter)
>>>> {
>>>> ...
>>>> dict_iter = dict_iterate_init(iter->dict->dict, prefix,
>>>>                         DICT_ITERATE_FLAG_RECURSE);
>>>> ...
>>>>
>>>> with DICT_ITERATE_FLAG_RECURSE set.
>>>>
>>>>
>>>> Same problem also with Dovecot 2.3.0.
>>>>
>>>> Thanks,
>>>>     Marco
>>>>
>>>>